Abstract
Vibration in mechanical devices is one of the major problems in engineering field including power generated industry. In this study we focused on the method and possible equipment design availability in reduction of vibration level. A brief overview of the outcomings of pipeline vibrations is presented, the sources of vibrations are listed and possible solutions for eliminating vibrations are described. Devices for passive quenching of pressure pulsations in pipelines with a two-phase flow are considered. We presented the description of the experimental stand on the investigation of the influence of a two-phase flow on the vibration of sections of a pipeline under different flow patterns of a coolant, as well as the procedure for conducting an experiment to study the properties of developed and manufactured swirl models. An animated model was developed that reflects the relationship of swirl geometry with the reduction of the vibro-displacement of the pipeline as a result of passive action on a two-phase flow.
Highlights
It is quite often to observe destructive vibrations causing acoustic and noise problems due to hydrodynamic forces acting on the structures or the loading lines
They provide twisting in the flow, partial separation of steam and water which leads to the generation of a circular flow regime
To study the influence of two-phase flow regimes on the pipeline vibration and the utility of the model passive device, an experimental stand was developed in our laboratory
Summary
It is quite often to observe destructive vibrations causing acoustic and noise problems due to hydrodynamic forces acting on the structures or the loading lines. Flow induced vibration (FIV) can cause severe damage to the piping system of the industrial machineries including system failure. Two-phase flow is frequently occurred phenomena in plants where boiler produces vapor. This mechanical vibration undermines the operational reliability, maintenance and safety issues of the industrial system. There are various ways to implement vibration reduction in practice, one of which is the installation of swirling devices - swirlers. They provide twisting in the flow, partial separation of steam and water which leads to the generation of a circular flow regime. Using the obtained and calculated values, we calculate the hydraulic resistance of the investigated insert-swirler in terms of head loss (Δh), length (L) and local acceleration due to gravity (g)
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